SAIL_301 add estimation weights for export

[AnneONS]

Pull Request submission

A new schema and changes to the user config and dev config to allow estimation weights file to be exported.

All tested in both Network and DAP.

Changing round( ) to .round() to try and solve an error- in the end not needed (but it's supposed to be better so I'll leave it in)

Closes or fixes

• Detail the ticket(s) you are closing with this PR
  Closes #SAIIL_301

Code

• Code runs The code runs on my machine and/or CDSW
• Conflicts resolved There are no conflicts (I have performed a rebase if necessary)
• Requirements My/our code functions according to the requirements of the ticket
• Dependencies I have updated the environment yaml so it includes any new libraries I have used
• Configuration file updated any high level parameters that the user may interact with have been put into the config file (and imported to the script)
• Clean Code
  • Code is as PEP 8 compliant as I can humanly make it
  • Code passess flake8 linting check
  • Code adheres to DRY
• Type hints All new functions have type hints

Documentation

Any new code includes all the following forms of documentation:

• Function Documentation Docstrings within the function(s')/methods have been created
  • Includes Args and returns for all major functions
  • The docstring details data types
• Updated Documentation: User and/or developer working doc has been updated

Data

• All data needed to run this script is available in Dev/Test
• All data is excluded from this pull request
• Secrets checker pre-commit passes

Testing

• Unit tests Unit tests have been created and are passing or a new ticket to create tests has been created

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Peer Review Section

• All requirements install from (updated) requirements.txt
• Documentation has been created and is clear - check the working document
• Doctrings (Google format) have been created and accurately describe the function's functionality
• Unit tests pass, or if not present a new ticket to create tests has been created
• Code runs The code runs on reviewer's machine and/or CDSW

Final approval (post-review)

The author has responded to my review and made changes to my satisfaction.

• I recommend merging this request.

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Review comments

Insert detailed comments here!

These might include, but not exclusively:

• bugs that need fixing (does it work as expected? and does it work with other code
  that it is likely to interact with?)
• alternative methods (could it be written more efficiently or with more clarity?)
• documentation improvements (does the documentation reflect how the code actually works?)
• additional tests that should be implemented (do the tests effectively assure that it
  works correctly?)
• code style improvements (could the code be written more clearly?)
• Do the changes represent a change in functionality so the version number should increase? Start a discussion if so.
• As a review you can generates the same outputs from running the code

Your suggestions should be tailored to the code that you are reviewing.
Be critical and clear, but not mean. Ask questions and set actions.